Stooges can be used in many ways. The person who signs the card doesn't have to be your stooge. There are several ways to use a stooge to get a card signed, put back in the deck, then moved to the inside of a window.
By the way, there's nothing wrong with using stooges. I personally don't do it often, but the few times I have done it met with great success. I've used girlfriends as stooges multiple times, even though everyone knew I was dating the person, and still blown everyone away.
stooges aint always bad u have a point. tha stooges that are bad that im talkin about is when criss has tha ENTIRE audience make him blankets, he does a trick, and everyone is in on it jus so u can show it on tv. THATS NOT STOOGES thats a SCRIPTED MOVIE FOR ENTERTAINMENT ON TV. not magic especially when he keeps sayin "what you see is what u get live" THATS FREAKIN BS!